Read Shakespeare s Sonnet 130. What is the central idea of the first quatrain? My

Read Shakespeare's "Sonnet 130." What is the central idea of the first quatrain?
My mistress' eyes are nothing like the sun;
Coral is far more red, than her lips red:
• My mistress is unattractive.
If snow be white, why then her breasts are dun;
O My mistress is beautiful.
If hairs be wires, black wires grow on her head.
• My mistress has a natural beauty.
I have seen roses damask'd, red and white,
• My mistress is not as beautiful as nature.
But no such roses see I in her cheeks;
And in some perfumes is there more delight
Than in the breath that from my mistress reeks.
Ilove to hear her speak, yet well I know
That music hath a far more pleasing sound:
grant a I never saw a goddess go,-
L
My mistress, when she walks, treads on the ground:
And yet by heaven, I think my love as rare,
As any she belied with false compare.